210120010121 has 16 divisors (see below), whose sum is σ = 243073353600. Its totient is φ = 177901484928.

The previous prime is 210120010091. The next prime is 210120010153. The reversal of 210120010121 is 121010021012.

It is a cyclic number.

It is not a de Polignac number, because 210120010121 - 2⁶ = 210120010057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210120010181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3613445 + ... + 3671133.

It is an arithmetic number, because the mean of its divisors is an integer number (15192084600).

Almost surely, 2^210120010121 is an apocalyptic number.

It is an amenable number.

210120010121 is a deficient number, since it is larger than the sum of its proper divisors (32953343479).

210120010121 is an equidigital number, since it uses as much as digits as its factorization.

210120010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64048.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210120010121 its reverse (121010021012), we get a palindrome (331130031133).

The spelling of 210120010121 in words is "two hundred ten billion, one hundred twenty million, ten thousand, one hundred twenty-one".